torque converter

I've got a stall up for sell on ebay. A guy wants to know if it will work on his 360. I had it on my 318-904 combo. What do I need to know from him to see if it will work? I know some 360's are internal or external balanced. I didn't want to sell it to this guy and him not mbe able to use it.
Thanks guys!!! :thumleft: